--主要是拷贝文件到save_path
function cp_file(path_t,save_path)
    local rgb_buf,w,h,fp,read_buf
    for k,v in ipairs(path_t) do
        fp = io.open(v.path,"rb")
        read_buf = fp:read("*a")
        fp:close()
        
        fp = io.open(save_path .. v.filename.. "." .. v.extension,"wb")
        --保存数据
        fp:write(read_buf)
        fp:close()
        
    end
end